Bonhams Arms and Armour auctions cover a range of European and Eastern armour and edged weapons; wheel-lock, flintlock, percussion and pin-fire rifles, guns, pistols and revolvers; American firearms including examples by the great makers such as Colt and Winchester; Islamic and Japanese weapons and armour; accessories including powder-flasks, books and other items relating to the armourer and his craft from 14th century to the late 19th century.

Bonhams also holds Modern Sporting Gun auctions comprising English and Continental side-lock, box-lock and over-and-under shotguns, double rifles, bolt-action rifles, and pistols. A variety of accessories including gun cases, cartridge magazines, cartridge boards, books and some sporting-taxidermy are also included in these auctions.